U.S. Office of Naval Research. The current phase of the project, initiated in 2012, seeks to demonstrate sustained fire, or "rep-rate" capability. The U.S. Navy hopes to eventually extend the range of EM rail guns to 200 nautical miles using 64 mega- joules, but as a single shot would require a stunning 6 mi

submarines and bombers, but in 1942 Germany added a fourth set of encoding wheels, escalating what was essentially a battle of machine intelligence. The U.S. Navy then contracted with the National Cash Register Company to build a computing machine capable of break- ing the improved Enigma, and in May 1943 it su